Sheet feed means for liquid process duplicating machine



Aug. 1, 1956 D. A. HARRIS ET AL 2,759,415

SHEET FEED MEANS FOR LIQUID PROCESS DUPLICATING MACHINE Filed Nov. '7,1952 3 Shets-Sheet l INVENTORY) DAVID A. HARRIS BY SAMUEL STEIN Aug. 21,1956 HARRls ET AL 2,759,415

SHEET FEED MEANS FOR LIQUID PROCESS DUPLICATING MACHINE Filed Nov. 7,1952 5 Sheets-Sheet 2 DAVID A. HARRIS Z0 SAMUEL STEIN Aug. 21, 1956HARRls ET AL 2,759,415

SHEET FEED MEANS FOR LIQUID PROCESS DUPLICATING MACHINE Filed Nov. 7,1952 s Sheets-Sheet s was 21 INVENTURS DAVID A. HARRIs SAMUEL STEINUnited States Patent SHEET FEED MEANS FOR LIQUID PROCESS DUPLICATIN GMACHINE David A. Harris, Flushing, N. Y., and Samuel Stein, NorthBergen, N. J.

Application November 7, 1952, Serial No. 319,308

2 Claims. (Cl. 101-1325) This invention relates to new and usefulimprovements in liquid process rotary duplicating machines forhectographic copying.

More particularly, the present invention proposes the construction of animproved duplicating machine having a novel paper feeding device whichwill feed blank sheets of paper from a stack, down to and including thelast few sheets in the stack, one at a time to a hectograph ink solventmoistening roller for passage therefrom to and between a platen and adrum bearing a master copy sheet thereon containing aniline dyeimpressions so that the solvent on a moistened sheet can dissolve afractional part of the dye on the negative master copy to provide apositive print on the blank sheet.

Another object of the present invention proposes providing the improvedrotary duplicating machine with a reciprocating paper feeding deviceactuated from the rotary crank of the machine and adjustable to feedpaper of different thicknesses and lengths.

Still further, the presentinvention proposes constructing theduplicating machine with an improved hectograph ink solvent feedingmeans and means to move the platen relative to the drum so thatadjustments of any degree can be made in the brightness of the copies.

As a further object, the present invention proposes arranging theduplicating machine so that copies can be made on almost any paper.

The present invention further proposes a novel arrangement of a singleeasily accessible adjustment lever to control the timing andregistration of the printing, the printing being raised on the paper bymoving the lever in one direction and lowered by moving it in the otherdirection.

For further comprehension of the invention and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawings forming-a material part of this disclosure:

Fig. 1 is a perspective view of a duplicating machine embodying thepresent invention.

Fig. 2 is a top plan view of the machine shown in Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a rear end view.

Fig. 5 is a sectional view taken online 5--5 of Fig. 2.

Fig. 6 is a fragmentary detail view of the reciprocating lever for thepaper feed device shown in the several figures. v

Fig. 7 is a perspective view of the liquid feed trough of the machine.

Fig. 8 is a sectional view taken on line 88 of Fig. 2.

Fig. 9 is a fragmentary side view of one end -of the drum and partsassociated therewith.

Fig. 10 is a sectional view taken on line 10 .10 of Fig.8.

Patented Aug. 21, 1956 Fig. 11 is a sectional view taken on line 11-11of Fig. 8.

Referring more particularly to the drawings, the duplicating machineillustrated in the several figures has two side plates or supports 15and 16 held in spaced relation by tie rods 17, 18 and 19. Rubber cushionrolls 20 are provided on rods 18 and 19 to cushion the machine and tosupport it.

A drum shaft 21 and a drum 22 are rotatably mounted between the supports15 and 16. The shaft 21 has each end journaled in one of the sidesupports and a crank 23 is fastened to one end of the drum shaft 21 onthe outer side of side support 15. Drum 22 is fixed to the drum shaft21, the ends of the drum being pinned to the shaft.

A platen 24 in roller form (see Figs. 4, 5, 8 and 11) is mounted betweenside supports 15 and 16 and adjacent the periphery of the drum 22. Meansto move the platen 24 toward and away from the drum 22 and to hold itwith varying degrees of pressure against the drum is provided asfollows. A pair of levers 25 and 26 are fulcrumed to side supports 15and 16 by pins 27 and 28 respectively. Platen 24 is rotatably fastenedbetween the levers 25 and 26 at the upper end of each lever. (Also seeFig. 11.) A lever actuating rod 29 (Fig. 5) is connected with the otherend of the levers, a cross rod 30 extending between the levers 25 and 26and fastened to them having a central opening 31 (see Fig. 4) throughwhich one end of rod 29 passes. This end of rod 29 is threaded and a nut32 is screwed on it to prevent the rod from being pulled through theopening 31 in the cross rod 31 when the lever actuating rod 29 is pulledby a knob 33 fastened to its other end.

The lever actuating rod 29 is threaded adjacent knob 33 and passesthrough a threaded upstanding guide 34 fiixed to tie rod 18. Adjustmentsof almost micrometer like accuracy may be made in the platen pressure byturning knob 33.

The platen 24, preferably of hard rubber, is disposed beneath the drum22 and a paper receiving plate 35 is p sitioned between the sidesupports 15 and 16 with one end underlying the platen. Plate 35 issecured to the side supports by screws 36 (see Fig. 5).

A moistening roller 37 is also rotatably mounted between the sidesupports 15 and 16 and adjacent the platen 24 at the front or feed endof the machine. Moistening roller 37 has its ends journaled in the sideplates. A pulley 38 at one end of the moistening roller 37 is alignedwith a second pulley 39 fixed to the drum shaft 21 at the crank end ofthe drum with a pulley belt 39 between the two pulleys to drive themoistening roller 37 from the drum shaft as the shaft and drum arerotated by the crank.

Adjacent the moistening roller 37, in front of it and below itsuppermost edge is a liquid trough 40 extending the full length of themoistening roller 37. One end of the trough is closed and the other endis connected with a gravity feed bottle holder 41 adapted to receive thetop portion of a bottle 42 (Fig. 1) of hectographink solvent liquid andfeed the liquid into the trough. A wick sheet 43 (Fig. 5) extending thefull length of the moistening roller 37 has one edge in the trough andanother edge portion abutting the moistening. roller to draw liquid fromthe trough onto the roller to moisten it. A cover 44 for the trough 40also extends over the moistening roller 37 and holds the wick sheetagainst this roller.

A pressure roller 45 is rotatably mounted between the side supports 15and '16 adjacent the bottom of the moistening roller 37. A pair ofpressure roller levers '46 and 47 are centrally fulcrumed on pins 48 and49 to the side supports 15 and 16 respectively. Pressure roller 45 isrotatably fastened to the upper ends of the levers a 46 and 47 as bybeing journalled in bushing 49. (See Fig. 10.) Preferably, the pressureroller 45 is of rubber and is spirally grooved. The lower ends of thelevers 46 and 47 are fastened to coil springs 50 and 51 respectively.The other end of spring 50 is fixed to side support and the other end ofspring 51 is fixed to side support 16, the spring normally biasing thepressure roller 45 against the moistening roller 37.

A paper feed ta'ble plate 52 is mounted between side supports 15 and 16and fastened to them by screws 53 at the front or feed end of themachine. One end of plate 52 is adjacent the moistening roller 37 andthe pressure roller 45 and is bent upwardly at 53 to provide a ramp tothe moistening roller 37 so that a sheet of paper can be fed from plate52 into the bight between the driven moistening roller 37 and pressureroller 45. A brace 54 extends from the plate 52 to tie rod 19.

A slide bar 55 is reciprocally fastened to side support 16, a slotopening 56 being provided in the slide bar and a retainer clamp 57 beingfastened to the side support 16 by screws 58 and extending through slotopening 56 with flanges 59 bent outwardly of the slot opening andoverlying the slide bar. The slide bar 55 is located at the front orfeed end of the machine.

A cross-slotted scotch yoke 69 is fixed to one end of the slide bar 55,as by screws 61. Yoke 60 has one elongated slot 62 around the drum shaft21 horizontally disposed and another elongated slot 63 at right anglesto slot 61 and vertically disposed.

The drum shaft 21 being encircled by slot 62 confines the movement ofthe yoke and the slide bar to re ciprocation.

A yoke pin lever arm 64 (see Fig. 9) is rotatably secured to the drumshaft 21 at one end of the arm, a sleeve 64' on the arm fitting over theshaft. The other end of the yoke pin lever arm 64 is removably fastenedto the periphery of the drum 22. This end of the arm 64 is bent over andspaced from the drum and a set screw 65 extends through the bent overportion of arm 64 to abut the periphery of the drum. Lever arm 64 ispositioned adjacent the end of the drum facing side support 16.

Yoke pin 66 is fixed to the lever arm 64 and spaced from the drum shaft21 radially of the drum. Yoke pin 66 is encircled by and movable in thevertically disposed cross-slot 63 of the scotch yoke 60 so as toreciprocate the yoke and slide bar as the drum is rotated.

A paper gripping member 67 is connected with the end of slide bar 55 toreciprocate with the slide bar. The paper gripping member 67 has a rod67 fixed at one end to the slide bar. A downwardly disposed forwardlybent bar 68 has its upper end rotatably fastened to the other end of rod67, a collar portion 69 being provided on bar 68 for this purpose.

The lower end of bar 68 is fastened to an axle 70 having two rubberwheels 71 swivelly but non-rotatively fixed thereto by a pivot pin 68a.The axle 70 is loosely and freely fastened to bar 68 so it can tilt androtate. Wheels 71 normally rest on the paper feed table plate 52.

A pair of 'paper guides 72 and 73 are slidably secured to the paper feedtable plate 52 and disposed lengthwise of the plate. The plate 52 hasslot openings 74 running crosswise of it and bolts 75 extend through theguides 72 and 73 and through the slot openings 74 to hold the guides tothe plate.

Guides 72 and 73 are made of angle stock as angle paper guides. Each hasan upstanding leg and a plate abutting leg. A sponge 76 is fixed to eachguide near its outer end to moisten the edges of paper held between theguides on plate 52. A leaf spring 77 is fastened to theback of eachupstanding guide leg and a sponge pressure adjusting screw 78 extendsthrough each leaf spring 77 and bears against a guide to hold the freeend 7 9 of each spring away from the adjacent guide leg.

A sponge opening 80 is provided in the upstanding leg of each angleguide, 72 and 73, and a sponge 76 is secured in each opening 80 with thefree ends of the leaf springs 77 hearing against the sponges.

To operate the machine a bottle 42 of hectographic ink solvent fluid isplaced in bottle holder 41. The original matter to be copied, a negativesheet made by typing, writing, drawing or otherwise marking on a sheetbacked by an aniline dye hectograph carbon paper, is secured to thedrum. By turning the crank 23, the drum is rotated reciprocating slidebar and feeding one sheet of blank paper 81 (see Fig. 5) from a stackpreviously placed in the feed plate into the bight, between themoistening roller and the pressure roller. These driven rollers willpull the sheet through the bight moistening it as it goes through. Thesheet is fed by the moistening roller and pressure roller into the bightbetween the platen and the drum where it is brought into direct contactunder pressure with the negative carbon impression. The solvent on themoist paper sheet dissolves a small pant of the dye on the masterleaving a positive print on the sheet which is passed from the drum tothe receiving table plate at the rear of the machine.

While we have illustrated and described the preferred embodiments of ourinvention, it is to be understood that we do not limit ourselves to theprecise constructions herein disclosed and the right is reserved to allchanges and modifications coming within the scope of the invention asdefined in the appended claims.

Having thus described our invention, what we claim as new and desire tosecure by United States Letters Patent 1. In a liquid process rotaryduplicating machine, the combination of a pair of side supports, a drumshaft and a drum rotatably mounted between said supports, a platenmounted between the side supports and adjacent the periphery of thedrum, a slide bar reciprocally fastened to one of the side supports, across-slotted scotch yokc fixed to the slide bar and having one slotaround the drum shaft, a slide bar actuating pin connected with the drumshaft and the drum adjacent one end of the drum and spaced from the drumshaft and the drum adjacent one end of the drum and spaced from the drumshaft radially of the drum, said yoke having its other slot around thepin for movement of the yoke when the drum is turned to reciprocate theslide bar, a paper gripping member connected with the end of the slidebar, said paper gripping member having a rod fixed at one end to theslide bar and extending midway between the side supports, a downwardlydisposed forwardly bent bar having its upper end rotatably fastened tothe rod and an axle with two rubber wheels fixed thereto loosely andfreely fastened to the lower end of the bent bar, a paper feed tableplate secured between the side supports with one end of the plateadjacent to the drum, said end of the plate being bent upwardly toprovide a ramp to the drum, a pair of angle paper guide members eachhaving an upstanding leg and a plate abutting leg slidably secured tothe plate and disposed lengthwise of the plate, a leaf spring fastenedto the back of each upstanding guide leg and a set screw extendingthrough each spring and bearing against a guide member to hold the freeend of each spring away from the adjacent guide leg, each angle guidemember having a sponge opening in its upstanding leg and a spongesecured in each opening with the free end of a leaf spring bearingagainst it.

2. In a liquid process rotary duplicator, a pair of side supports, adrum, a drum shaft rotatably mounting said drum, a sliding bar slidablyfastened to one of the side supports, a cross-slotted scotch yoke fixedto the slide bar, the drum shaft being encircled by one slot of the yoketo confine the movement of the yoke and slide bar to reciprocation, ayoke pin lever arm having one end rotatably secured to the drum shaftand the other end removably fastened to the periphery of the drum, saidlever arm being adjacent the yoke, a yoke pin fixed to the lever armspaced from the drum shaft radially of the drum, said pin beingencircled by and movable in the other cross slot of the yoke toreciprocate the yoke and the slide bar as the drum is rotated, a papergripping member connected with the end of the slide bar to reciprocatetherewith, said paper gripping member having a rod fixed at one end tothe slide bar and extending midway between the side supports, adownwardly disposed forwardly bent bar having its upper end rotatablyfastened to the rod and an axle with two rubber wheels fixed theretoloosely and freely fastened to the lower end of the bent bar, a paperfeed table plate secured between the side supports adjacent the rubberwheels with the wheels normally resting on the plate, a pair of anglepaper guide members having an upstanding leg and a plate abutting legslidably secured to the plate and disposed lengthwise of the plate, aleaf spring fastened to the back of each upstanding guide leg and a setscrew extending through each spring and bearing against a guide memberto hold the free end of each spring away from the adjacent guide leg,each angle guide men1- her having a sponge opening in its upstanding legand a sponge secured in each opening with the free end of a leaf springbearing against it.

References Cited in the file of this patent UNITED STATES PATENTS 35,131Redstone Apr. 29, 1862 658,705 Dexter Sept. 25, 1900 1,135,068 SpurrApr. 13, 1915 1,292,377 Runyan Jan. 21, 1919 2,086,138 Roque July 6,1937 2,112,342 Klemm Mar. 29, 1938 2,168,486 Marchev Aug. 8, 19392,172,113 Storck et al Sept. 5, 1939 2,212,659 Costello Aug. 27, 19402,214,960 Harding Sept. 17, 1940 2,489,712 Kelly Nov. 29, 1949 2,518,878Gerlach Aug. 15, 1950 2,534,765 Genz Dec. 19, 1950 2,558,046 Geib June26, 1951 2,565,370 Hodin Aug. 21, 1951 2,594,179 Keil Apr. 22, 1952OTHER REFERENCES Mechanical Engineers Handbook, Kent, 11th edition.Published by John Wiley and Sons Inc., New York. Page 8-08.

